下列哪些是化脓性脑膜炎脑室穿刺的适应证() A.B超示脑室明显扩大者 B.积极抗

根据汉语或英文提示，结合句意，填上适当的单词。

1. He likes to go to the      (图书馆) to read books when he has free time.

2. I       (相信) you will surely be successful. So be confident of yourself.

3. Have you ever been       (出国)?

4. To reduce your _____(体重), you should eat less and do more exercise.

5. He is always _____(乐意的) to help people in trouble.

6. I think fights in some action film have a bad _____(影响) on teenagers.

7. My father is one of my _____(偶像). I hope to be a man like him.

8. Tomorrow is my grandma's _____(六十) birthday.

9. _____(lucky), I caught the last train.

10. It's _____(create) of you to design the wonderful poster.

11. At the        (begin), I felt it not easy to get on with him.

12. It's        (polite) to ask a woman about her age.

13. The Great wall attracts thousands of       (visit) every year.

14. He has made his _____(decide) to change his job.

15. I will have my computer _____(repair) tomorrow.

若x²+bx+1＝0的两个根为x₁和x₂，且

则b的值是( )．

A．( -10

B．( -5

C．( 3

D．( 5

E．( 10

失效桥枕的标准是什么？

1型糖尿病的临床特点有（）

A.多发生于青少年，起病较急，病情较重

B.血浆胰岛素水平低下

C.较少发生酮症酸中毒

D.必须胰岛素治疗

E.对胰岛素敏感，不易发生低血糖反应

一段炉炉管在运转中会出现（）现象。

A.热管

B.热带

C.热斑

D.A、B和C